OK, let's crack this. We're given 411 and our task is to multiply it by 50. Essentially, we'll be adding 411 to itself 50 times.
Step 1: 0 + 411 = 411
Step 2: 411 + 411 = 822
Step 3: 822 + 411 = 1233
Step 4: 1233 + 411 = 1644
Step 5: 1644 + 411 = 2055
Step 6: 2055 + 411 = 2466
Step 7: 2466 + 411 = 2877
Step 8: 2877 + 411 = 3288
Step 9: 3288 + 411 = 3699
Step 10: 3699 + 411 = 4110
Step 11: 4110 + 411 = 4521
Step 12: 4521 + 411 = 4932
Step 13: 4932 + 411 = 5343
Step 14: 5343 + 411 = 5754
Step 15: 5754 + 411 = 6165
Step 16: 6165 + 411 = 6576
Step 17: 6576 + 411 = 6987
Step 18: 6987 + 411 = 7398
Step 19: 7398 + 411 = 7809
Step 20: 7809 + 411 = 8220
Step 21: 8220 + 411 = 8631
Step 22: 8631 + 411 = 9042
Step 23: 9042 + 411 = 9453
Step 24: 9453 + 411 = 9864
Step 25: 9864 + 411 = 10275
Step 26: 10275 + 411 = 10686
Step 27: 10686 + 411 = 11097
Step 28: 11097 + 411 = 11508
Step 29: 11508 + 411 = 11919
Step 30: 11919 + 411 = 12330
Step 31: 12330 + 411 = 12741
Step 32: 12741 + 411 = 13152
Step 33: 13152 + 411 = 13563
Step 34: 13563 + 411 = 13974
Step 35: 13974 + 411 = 14385
Step 36: 14385 + 411 = 14796
Step 37: 14796 + 411 = 15207
Step 38: 15207 + 411 = 15618
Step 39: 15618 + 411 = 16029
Step 40: 16029 + 411 = 16440
Step 41: 16440 + 411 = 16851
Step 42: 16851 + 411 = 17262
Step 43: 17262 + 411 = 17673
Step 44: 17673 + 411 = 18084
Step 45: 18084 + 411 = 18495
Step 46: 18495 + 411 = 18906
Step 47: 18906 + 411 = 19317
Step 48: 19317 + 411 = 19728
Step 49: 19728 + 411 = 20139
Step 50: 20139 + 411 = 20550

So, 411*50 = 20550